The first category: magma rock (igneous rock, Igneous Rock)-magma is formed close to the ground or the surface is cooled and solidified. This is divided into two situations. 1. Magma is erupted from the crater and becomes lava, which is rapidly cooled at room temperature and becomes extrusive. Because the magma cools quickly and does not give the minerals time to crystallize, it looks more delicate. The second category: metamorphic rocks It is the solid rock that was heated and pressurized under the ground (it was not fully melted, but fully recondensed, it was igneous rock), which had undergone physical and chemical changes and rebuilt. Magmatic rocks, sedimentary rocks and metamorphic rocks can all be transformed into metamorphic rocks. The third major category: Sedimentary rocks The weathered sediments of the rock masses gather, some melt in water and some crystallize, and under pressure, they "grow" together.
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